The change is not subject to NOTAM because sufficient notice has been given for it to be incorporated into the AIRAC 28 day amendment system. This requires amendments to the AIP to be promulgated 42 days in advance so that they are in the hands of the recipients at least 28 days in advance of the effective date.
CAA VFR Charts have published a chart amendment
here.
The amendment itself is currently on the AIS site as a pending amendment
here and the updated page in the AIP will appear
here on the amendment date, 10 July.
It would be interesting to get some feedback from subscribers to flight guides on when (or if) they actually get the amendment.
The actual amendment is:-
APP changed to 130.775
Radar changed to 130.775 and 128.950
I suspect that I can say with some confidence that subscribers to Pooleys amendment service will not get it in time because AFIK they don't follow the AIRAC cycle.
Mike